Machine for operating on lasts



Fe 22, 1944. A. R. SCHOENKY 2,342,226

MACHINEFOR OPERATING ON LASTS Originab Filed Jan. 2, 1941 5 Sheets-Sheetl Figcl.

I Feb. 22, 1944. A. R. SCHOENKY MACHINE FOR OPERATING ON LASTS OriginalFiled Jan. 2, 1941 5 Sheets-Sheet 2 Feb. 22, 1944. A. R. SCHOENKYMACHINE FOR OPERATING ON LASTS Original Filed Jag. 2, 1941 5Sheets-Sheet 3 R W WR Feb. 22, 1944.

A. R. SCHOENKY MACHINE FOR OPERATING ON LASTS Original Filad Jan. 2,1941 5 Sheets-Sheet 4 Feb. 22, 1944. R, HOE Y 2,342,226

MACHINE FOR OPERATING ON LASTS Original Filed Jan. 2, 1941 5Sheets-Sheet 5 Fig: 5.

102s O 91.2 a m o e O 1028 K v 0 are a II I *E o 886 e e N 1002 2 m 1000I 55 978 W W 9645 as; O T q o 2 984 O J Fig: 7.

Patented Feb. 22, 1944 UNITED STATES PATENT OFFICE MACHINE FOR OPERATINGN LASTS August It. Schoenky, Swampscott, Mass assignor to United ShoeMachinery Corporation, Flemington, N. J., a corporation of New JerseyOriginal application January 2, 1941 Serial No. 372,749. Divided andthis application June 16, 1942, Serial'No. 447,234

3 Claims.

This invention is concerned with machines for providing the bottoms oflasts with bushings to receive jig pins, and the present application isa division of my copending application for Letters Patent of the UnitedStates, Serial No. 372,749, filed January 2, 1941 now Patent No.2,315,548, April 6, 1943.

My former application mentioned above illustrates and describes amachine comprising a group or gang of three rotary drills arranged tobore holes in the bottom of the forepart of a wooden last for thereception of metallic bushings. The machine is provided with means forlocating the forepart of a last with respect to the drills, and withmeans for securing the last in the desired location. It is also providedwith a group or gang of tools for inserting bushings into the drilledholes, and with means for supplying the bushings to those tools. Theelements of the machine are so organized and operated that bushings aresupplied to the inserting tools while the drills bore the holes, afterwhich the drills are withdrawn from the last, the drills and theinserting tools shifted laterally to place the loaded inserting tools inregister with the drilled holes, the inserting tools advanced to insertthe bushings, the inserting tools withdrawn from the bushings, and,theinserting tools and the drills again shifted laterally, but in theopposite direction, to place them in their initial positions.

The present application is concerned chiefly with those features thatrelate to the means for supplying the bushings to the inserting tools.One of those features provides a safeguard to avoid breaking or bendingthe raceways that supply the bushings, in the event that one or more ofthe latter are fouled by the inserting tools or by other bushings thatremain on the tools instead of clinging to the last, as when a drill isbroken.

Referring to the drawings,

Fig. 1 is a side elevation, partly in section, of that portion of alast-drilling machine which includes means for locating and securing alast for the operations to be performed (see Fig. 5 of parentapplication);

Fig. 2 is a front elevation, partly in section, of the lower portion ofthe machine including a cam shaft and power means for driving it (seeFig. 18 of parent application) Fig. 3 is a front elevation, partly insection, of the middle portion of the machine including the drills, thetools for inserting the bushings, and the carriage on which they aremounted (see Fig. 24 of parent application) Fig. 4 is a vertical sectionin a plane from front to rear (see line IV-IV in Fig. 3) including theinserting tools and the means for supplying the bushings, as in Fig. 34of the parent application;

Fig. 5 is a top plan view, partly in section, of the structureintersected by line VV in Fig. 4 (see Fig. 37 of parent application)Fig. 6 is an elevation, partly in section, similar to a portion of Fig.4 and indicated by line VIVI in Fig. 5 (see also Fig. 38 of parentapplication) and Fig. 7 is a vertical section including a portion of alast and one of the inserting tools in the act of inserting a bushing(see Fig. 40 of parent application) To facilitate comparison thereference numerals used herein have the same identity as in the parentapplication.

The frame of the machine comprises a hollow base 50 (Figs. 2 and 3) anda superstructure 54 (Fig. 1) mounted thereon and aflixed thereto. Asshown in Fig. 3, a horizontal plate 84 is mortised into the upper wallof the base 50 and is affixed thereto by pins 83 and clamping mem-' bers85. This plate provides a bed for supporting a group or series of gaugesof which three are indicated at 66, 62, and 8B in Fig. 1. Two othergauges omitted from this figure are comprised in the group andcorrespond respectively to those indicated at 66 and 62. These gaugesare grouped to embrace the toe portion of a last L and are formed toprovide supporting ledges on which the margin of the bottom of the lastis to be seated. They are also provided with upwardly projectingportions that constitute shoulders or abutments to engage the perimeterof the last and thereby establish the desired lengthwise and widthwiselocation of the forepart.

When a last has been lodged in the gauges, the

is arranged to slide up and down in a bearing formed in thesuperstructure 54 of the frame and its vertical movements are impartedto it by a lever III] with which it is connected by parts havingprovision for adjusting the heightwise initial position of the stem inaccordance with the thickness of the toe portion of a last. Theseconnecting parts include a rod I00, 2. hand wheel ll l afiixed to theupper end thereof, a screw threaded portion lute pin I04 through whichThe block 92' the threaded portion I52 extends and in which acomplemental screw thread is formed, and a cross pin 98. The stem 96 isbored to provide a bearing for the pin 98 and the latter is bored andprovided with a screw thread to engage a corresponding screw thread onthe lower portion of the rod Hill. This screw thread and that indicatedat I52 are oppositely pitched to effect vertical adjustment of the stem95 with respect to the lever ll when the rod IE5 is turned. The leverderives its operating motion from the treadle above mentioned.

A member 88 supplements the block 92 to steady the last and to brace itsheel end against being displaced by upward force exerted against thebottom of the last, first by thedrills and thereafter by the tools thatinsert the bushings. The member 88 is carried by a vertically movableplunger. 252 arranged to slide in bearings in a bracket 2,54 affixed tothe frame member 54. A compression spring 262 surrounds the plunger andexerts its force against a knob 255 to maintain the plunger initially inan elevated position, but when the plunger is depressed manually tocarry the member 88 into engagement with the last it is prevented fromrising by a latch 284 arranged to cooperate with a series of ratchetteeth 282 formed on the plunger. A light spring 285 normally holds thelatch in latching position. 7 Referring to Fig. 3, three rotary drills55 are arranged in a group below the plate 84 and are adapted to beelevated through holes 532 formed in the plate. Moreover, three tools 58are also arranged below the plate and in a similar group. While thedrills are rising through the holes 532 the tools 58 are elevatedthrough holes 548 in the plate for the purpose of picking bushings B(Fig. 5) from raceways 545. In due course, the drills 55 and the tools58 descend below the plate 84, the rill ha n o o s in he o t of the lastand the tools 58 having been loaded with bushings. When this stage isreached the drills and the loaded tools 58 are all shifted to the left(Fig. 3) and the loaded tools are thus brought. into register with theholes 532. Here, they'are again elevated, this time to force thebushings into the drilled holes in the last.

The assemblage of drills 55 and tools, 58, together with elements foroperating them, are mounted on a carriage 456, arranged to bereeiprocated horizontally on a track 572. (See also Fig. 4.) Thecarriage 455 derives its motions from a cam 592 (Figs. 2 and 3) which isone of a series of cams mounted on a shaft 535. A lever 600 shown inFig. 3 is mounted on a fulcrum pin 652 and comprises an arm 598 and alonger arm 658. The arm 598 is provided with a cam roll 556 thatcooperates with the groove, 594 of the cam 592 but the arm 608 isconnected to the carriage 456 by a link 622 and other parts forming anadjustable connection between the link. and the arm. The purpose of thisadjustable connection is to regulate the effective length of the arm 608by moving the link B22 toward or from the fulcrum pin 502 as may benecessary to render the strokes of the carriage exactly equal to thedistance between the axes of'the, drills 55 andthe correspondingaxes ofthe tools 58.

The drills 56 are affixed to individual spindles, one of which isindicated at 404 in Fig. 3 and the spindles are all arranged in bearingsprovided by a vertically movable drill head 452'. This drill head isarranged to slide up and down on a track 453' provided by an upstandingbracket. affixed to the carriage 455. The upper portions of the drillspindles are surrounded by sleeves 458 and are thereby braced againstlateral displacement. The sleeves 458 are arranged in individualbearings bored through a member 428 which constitutes a portion of thevertically movable drill head. The lower ends of the spindles arejournaled in bearings 444 in the head and they are supported by a bottomplate 445, also a part of the drill head. This part of the drill head isconnected to the forward end of an operating lever 5l2 by a link 5l8 theupper portion of which is flanked by two bosses 520 formed on the plate.The bosses and the link 5H3 are connected by .a pivot pin. The operating lever 5l2 is mounted on a fulcrum rod 5M and this rod is arranged inbosses 5l6 formed on the carriage 455. The rear end of the lever M2 isprovided with a roll 524 (Fig. 2) that occupies a cam groove 526 whenthe drills are located at the drilling station. The cam groove 526 isformed in the left hand face of a cam disk 528 carried by the shaft 530.The cam disk 528 is also provided with a cam groove 628 in its righthand face, and this cam groove is utilized to operate the tools 58 at alater stage in the cycle of operations. When the carriage 456 is shiftedto the left, after the drilling operation has been completed and thedrills withdrawn, it carries the operating lever 512 away from the camdisk 528 and thereby interrupts the oper ating connection, but at alater stage in the cycle the carriage is, returned to its initialposition and the cam roll 524 is thereby restored to its position in thecam groove 525.

Referring to Fig. 3, the drill spindles are provided with individualpinions 445, 448' and 450. The pinions 44B and 455 are both engaged anddriven by a pinion 452. The latter has splined connection with avertical transmission shaft 455, the upper portion of which is journaledin a bearing in the drill head 432 and the lower portion of which isjournaled in bearings in a gear case 468 affixed to the carriage 455.Rotation of the pinion 455 is transmitted to the pinion 44.8 by anintermediate pinion 454. All these pinions may travel up and down withthe drill head but the transmission shaft 466 does not partake of thisup and down movement.

A spiral gear 472 affixed to the transmission shaft 455 is driven by acorresponding gear (not shown) afiixed to a horizontal transmissionshaft 475, one end of which is journaled in bearings in the gear case468 and the other end of which has telescopic connection with acontinuously rotating driving sleeve 478; This telescopic connectionincludes splines by which ro tation is imparted to they shaft 415. Thedriving connections between the sleeve 4:7'8 and'thedrill spindles arethus maintained, notwithstanding the horizontal reciprocation of thecarriage 455.

The inserting tools 53 are carriedup and down by a toolrhead 55B (Figs;Sand 4) arranged to slide on a vertical track55-2 affixed to thecarriage 455. The carriage is, also provided with a lever 545 by whichthe tool head 580 is movedup and'down. This lever is mounted on thefulcrum rod 514; and the-forward end of the lever is connected to thetool head by a link.

542. The rear end of. the lever 545' is provided with two cam rolls 538and 535' (Fig. 2) one at the right-hand side of the lever and the. otherat the left. When the tool carriage 455 stands in its initial position(Fig; 3)' the cam roll 5'35" occupies a cam groove 556- in the left handface" of Ca, cam disk 534, but at this stageithecam roll 630. hasnocontact with any cam and is merely supported in the air. The camgroove 536 elevates the tools 58 far enough to insert them into bushingsin the raceways, and thereafter retracts thembelow the plate 84 beforethe carriage 456 isshiftedto the left. When such shifting occurs, thelever540 is transferred from the cam disk 534 to the cam disk. 528 (Fig.2) in the right hand face of which'acam groove 628' is provided to:receive the. cam roll 630. Then,.while the tools 58 are in registerwith the holes previously bored in the bottom of the last by the drills56, the cam groove 628 elevates the tool head 500 to insert: thebushings into the drilled holes and thereafter retracts the. toolhead-500 to its lower limit of travel. Finally, the carriage 456 returnsto 'its initial position.

Although the up-and-down movements of the tool head 500 are effectedpositively by the cams 536 and 628, the tools'58 are arranged inindividually yieldable holders 488 (Fig. 7) each upheld by a compressionspring 506. The stems of the holders 488 extend through the springs andtheir lower ends are arranged to slide in holes in the portion I0 of thehead. Flanges 584 surrounding the holders are normally held against theupper portion 498 of the tool head by the springs.

'All the cams mounted on the shaft 530 are affixed thereto with theexception of the cam 592 which reciprocates the carriage 456. This camis driven at half speed and, accordingly, is not keyed to the shaft. Asshown in Fig. 2, the right hand end of the cam 592 is provided withinternal gear teeth 142. A gear 136 keyed to the shaft 530 drives aplurality of pinions (not shown) each of which engages the internalteeth 142. These pinions are mounted on the frame 50 and have fixedcenters of rotation.

Referring to Figs. 4, 5 and 6, bushings B are stored in a hopper 9I6from which they are fed by a rotary brush 924 and emitted through portsfrom which they gravitate down inclined raceways 546. The delivery endsof the raceways stand initially in register with the tools 58. Eachraceway is provided with a spring-pressed finger 964 pivotally mountedthereon and arranged normally to arrest the foremost bushing in a seriesat the point of delivery but to be deflected to permit that bushing tobe picked from the raceway by a tool 58. As shown in Fig. 7 the lowerend of each bushing is provided with a flange 481 adapted to be seatedagainst the bottom of a last L when the barrel portion of the bushing isinserted into a hole in the last. When the bushings reach the deliveryends of the raceways they stand on their flanged ends to receive thetools 58 as the latter rise above the plate 84. Once the tools have beeninserted into the bushings the raceways are retracted with horizontalmovement and the bushings lodged on the tools 58 are thus picked fromthe raceways with corresponding deflection of the spring pressedretaining fingers 964.

In the event that a drill becomes broken and either fails to dril1 ahole in the last or leaves its drilling end in the last the bushinglodged on the corresponding tool 58 will remain on the tool 58.Consequently, when this tool next rises through its hole 548, thebushing that remains on it will foul the bushing then at the deliveryend of the corresponding raceway. For this reason the raceways are somounted as to be lifted to the position represented by dotted lines inFig. 6.

F The raceways andthe' hopper 9I6 are all af fixed to a bracket 9I8.This bracket is arranged to swing about a vertical shaft 932 by which itis connected to another bracket 968. The bracket 968 is arranged to rockon a horizontal pivot rod 910 by which it is connected to a stationarybracket :912 affixed to the frame element 50; Now, in theevent that thedelivery ends of the raceways are lifted by any one of the tools 58 theassemblage including the raceways, the hopper and the two brackets 9I8and 968 will rock on the horizontal pivot rod 910 to avoid damage to theraceways, and when this occurs the rocking movement of the assemblagewill be resisted in a moderate degree by the weight of the assemblageand by a compressionspring I000 interposed between the movable bracket968 and an upstanding arm i002 formed on the stationary bracket 912.Moreover, once the delivery end of the raceway has been liftedfrom itsnormal position on the plate 84 it will be caught by a latch I004 (Fig.6) and thereby supported in its raised position until the obstruction isremoved and the latch retracted by an attendant. A light spring isarranged to project the latch under a block I006 afiixed to the bracket968 when the raceways are lifted. The latch is provided with anupstanding pin IOI0 by which it may be retracted to release the racewayassemblage.

Sidewise movement of the raceways is obtained by oscillating the bracket9I8 about the vertical shaft 932. The delivery ends of the raceways arenormally maintained in register with the centers of the holes 548 by acompression spring 918 (Fig. 5) that surrounds a rod 916 and exerts itsforce against a nut 984 screwed on one end of the rod. The other end ofthe spring is seated against a portion of the bracket 968. The rod 916is connected to the bracket 9I8 and the latter is thereby drawn againsta stop. For this purpose an adjusting screw 986 carried by the bracket9I8 is arranged to engage an abutment on the frame element 50.

Retraction of the raceways from the tools 58 is effected by a cam faceIOI2 (Fig. 2) on the cam disk 534, and a cam roll IOI4 (Figs. 2 and 4)mounted on an arm IOI6 amxed to the lower end of a vertical rock shaftI0l8. The rock shaft is arranged in a stationary lower bearing I020 anda stationary upper bearing I022 (Fig. 5) in the bracket 912. An arm I024is affixed to the upper end of the rock shaft and its motions arecommunicated to the bracket 9I8 by a link I026. For this connection thebracket 9I8 is provided with an arm I028. 1

The vertical shaft 932 serves not only as a pivotal connection betweenthe brackets 9I8 and 968 but also plays a part in transmitting rotationfrom the shaft 530 (Fig. 4) to the brush 924 in the hopper. A gear 930affixed to the shaft 932 drives a gear 928 aflixed to the shaft 926 onWhich the brush 924 is mounted. Since the shaft 932 and the brackets 9I8and 968 may sometimes be required to rock slightly on the horizontalpivot rod 910, the following connections are provided to drive the shaft932. As shown in Fig. 4, a vertical shaft 942 is journaled in astationary bracket 944 and is provided with a spiral gear 948 arrangedto be driven by a corresponding gear 950 keyed to the shaft 530. Theupper end of the shaft 942 and the lower end of the shaft 932 areconnected by articulated transmission elements including universaljoints 940 and 934 and an intermediate coupling 938 in which the partsare telescopically related.

The cam shaft 530 (Fig. 2) receives rotation from a driving belt 644arranged to run on the driving member 642 of a frictional cone clutch.The driven member 650 of the clutch is movable axially to the left toengage the driving member but when retracted therefrom it engages abrake ring 652 affixed to the frame so. Rotation ofthe driven clutchmember 650 is transmitted to the shaft 530 by a gear train 638.

Having thus described my invention, j what I claim .as new and desire tosecure by Letters Patent of the United States is:

1. In a machine for inserting bushings zinto preformed holes in thebottoms of work pieces, means for securing a work piece in abushingreceiving position, a bushing-inserting tool formed to projectupwardly into a bushing standing on end, mechanism arranged to move saidtool up and down, a raceway the delivery end of which is movablelaterally to and from the path of said tool and yieldable upwardly inthe event of obstruction between it and the tool, and

means for displacing the delivery end of the raceway from said pathwhile a bushing therein is occupiedby said tool.

2. :In..a machine organized as specified in claim 1, latching meansarranged to maintain the de. liver end of the raceway above its normallevel in the event of its being elevated by :an obstruction in the pathof the tool.

3. In a machine for inserting bushings into preformed :holeszin thebottoms of work pieces, means for securing a work piece in abushingreceiving position, .a bushing-inserting tool formed .to projectupwardly into a bushing standing on end, mechanism arranged to move said.tool up anddown, a raceway movable about a vertical axis to shift itsdelivery end to and from the path of :said tool and movable about ahorizontal axis to .enable its delivery end to yield upwardly in theevent of obstruction between it and the .tool, and means for displacingthe delivery end of the raceway .fromsaid path while a bushing thereinis occupied by the tool.

. AUGUST R. .SCI-IOENKY.

